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STATEMENT OF CASH FLOWS’ COMPLEMENTARY INFORMATION (Tables)
12 Months Ended
Dec. 31, 2023
Statement Of Cash Flows Complementary Information  
Schedule of adjustments to reconcile net profit to cash flows generated by operating activities
             
  Note   12.31.2023   12.31.2022   12.31.2021
Income tax 10.6   318   124   77
Accrued interest     283   185   141
Depreciations and amortizations 9 and 10.2   267   212   205
Share of profit of joint ventures and associates 5.3.2   2   (105)   (100)
Profit from sale/acquisition of companies´ interest           (9)   -   (17)
Results for property, plant and equipment sale and derecognition 10.4   1   (2)   (1)
Result for intangible assets sale 10.4   -   (2)   (2)
Impairment of property, plant and equipment, intangible assets and inventories 11.1, 11.2 and 11.4   39   38   4
(Impairment) Recovery of impairment of financial assets     -   4   (1)
Result from present value measurement 10.5   10   14   1
Changes in the fair value of financial instruments     (392)   (94)   24
Exchange differences, net     (190)   (85)   (3)
Result from exchange of CB 10.5   -   14   -
Result from repurchase of CB 10.5   (1)   (6)   -
Readjustment of investment plan  10.4   -   9   -
Costs of concessions agreements completion 10.4   5   -   -
Contractual indemnity 10.4   (7)   -   -
Contractual penalty 10.4   7   -   -
Compensation for arbitration award 10.4   -   (37)   -
Provision for contingecies, net 10.4   8   4   3
Provision for environmental remediation 10.4   4   -   15
Fair value of consortiums' previous interest 10.4   (7)   -   -
Impairment of other receivables 10.4   5   -   -
Ecuador's transactional agreement  10.4   5   -   -
Expenses recovery 10.4   (8)   -   -
Accrual of defined benefit plans 9 and 10.2   26   14   11
Compensation agreements  10.2   37   19   2
Derecognition of unproductive wells  10.3   7   -   -
Other     (4)   (4)   3
Adjustments to reconcile net profit to cash flows from operating activities     406   302   362
Schedule of changes in operating assets and liabilities
             
      12.31.2023   12.31.2022   12.31.2021
Increase in trade receivables and other receivables     (151)   (233)   (41)
Increase in inventories     (35)   (21)   (40)
Increase in trade payables and other payables     17   70   43
Increase in salaries and social security payables     20   15   8
Defined benefit plans payments     (3)   (3)   (2)
Increase (Decrease) in tax liabilities     27   41   (2)
Decrease in provisions     (7)   (1)   (3)
Income tax payment     -   (2)   (13)
Payments for derivative financial instruments, net     (4)   (6)   (12)
Changes in operating assets and liabilities     (136)   (140)   (62)
Schedule of significant non-cash transactions
           
    12.31.2023   12.31.2022   12.31.2021
Acquisition of property, plant and equipment through an increase in trade payables   (82)   (75)   (51)
Borrowing costs capitalized in property, plant and equipment   (21)   (11)   -
Increase of property, plant and equipment through exchange of assets   (25)   -   -
Acquisition of subsidiary by delivering financial assets at fair value through profit and loss   -   (35)   -
Receivables from sales of companies pending collection   -   -   40
Receivables for acquisition of subsidiary   -   7   -
Increase in investments in associates through a decrease in other receivables   -   -   (20)
Increase in right-of-use assets through an increase in other liabilities   (13)   (1)   (7)
Dividends pending collection   -   -   2
Decrease in asset retirement obligation and wind turbines decommision through property, plant and equipment   (5)   (1)   (1)
Decrease in associate's equity interest through increase in other receivables    -   6   -